"Carpet bomb? If the USA wanted to "carpet bomb" there would be thousands and thousands of "innocents" killed in FATA, Khyber Pakhtunkhwa and even Karachi. No, the USA's drone strike effort is exactly what you have said that Khan would do with drug lords. There is no need to bring in specious anti-American arguments to make your points about IK.
Let's not reject the ground realities now. The US has killed innocent civilians in drone strikes, & in March 2011, they did kill 40 innocent tribal elders. But I have read detailed local & international reports on drone strikes statistics, & their accuracy of killing militants has increased greatly. In 2008 & 2009 (& before that), civilian casualties from drone strikes was much higher. These days, the US is involved in many more 'signature' strikes than 'personality' strikes, & the number of 'signature' strikes must be decreased.